Rebar in a 3 foot by 18 inch poured foundation

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Rebar_design.jpg
The drawing actually shows 2 "J" hooks.

I'm assuming you have, in your forms, established a finished grade level for the plumber.

Maybe the 2 "J" hooks are overkill. I wanted to connect the support for the 4 horizontal runs to the existing foundation. I have attached another idea. What do you think?

Yes, the for the new monolithic foundation will actually be 4"inches above the existing foundation that is exposed. There is a 4" inch step where the door is currently located and that is level with the kitchen which is right inside the door. The new pour will put the new bathroom and the kitchen at the same level. I have a self leveling 360 degree laser level that I used to make the forms level with that 4" step.
 
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Thank you all for your help. The drains are in, and now I am ready to gravel, grade and setup the rebar for the concrete pour!
 

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" One or more bare or zinc galvanized or other electrically conductive coated steel reinforcing bars or rods of not less than 13 mm (1⁄2 in.) in diameter, installed in one continuous 6.0 m (20 ft) length, or if in multiple pieces connected together by the usual steel tie wires, exothermic welding, welding, or other effective means to create a 6.0 m (20 ft) or greater length; or
(2) Bare copper conductor not smaller than 4 AWG.
"

Tom, although I've legally built 100's of additions that employed the existing elec. service, I was never required to provide a UFER grnd., unless the service was being relocated, and I've always found the 20' encasement requirement, ambiguous at best, because rebar is stock length at 20' and in other than slab foundations, sometimes up to 2' is stubbed up to account for the joisting.
The answer to the length issue is to tie the cross or ring pieces together as you would anyway and tie the next parallel long rebar to those as you would anyway. That section specifically allows "or if in multiple pieces connected together by the usual steel tie wires." Forgive me if I misunderstood your question but if you need a concrete guy I'm a pretty fair electrician.

--
Tom
 
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